Will HTML5 Revolutionise Raster Web GIS?

Or perhaps that should be rephrased start browser-based raster GIS? GIS data is split into two base types – vector data – geometric shapes, usually further split into points, lines, and polygons, and raster data – cell-based or “pixelated” data. Graphics on the web mirror this divide. On the vector side SVG – scalable vector […]

GIS Servers and the 64-bit Question

The following is the first in a series of posts related to configuring a 64-bit Windows server as a GIS server  using MapServer and Python. Why move to 64-bit? If a server’s operating system and hardware are 64-bit it seems a waste not to take advantage of them. It may be better to look at […]

OpenSource Upgrades

Moving to new versions in OpenSource has in the past been like playing Russian roulette. Just now clicking on “Upgrade to WordPress 3.0” I thought would lead to a greater understanding of the database schema, template inconsistencies, and plug-in idiosynchrocies of WordPress as I met an inevitable “Upgrade Failed. Please see log for details” message. […]

Source Control using BitBucket

Putting code under source control is on most checklists for modern software development. Even small side projects, scripts, and code snippets can benefit from being under source control. For example: When you improve the code others can see the changes and get the benefits If someone else improves the code those improvements can be passed […]


Everyone loves aerial photography. Some of its early pioneers were the James Bonds of their era. Twenty years ago people could go round neighbourhoods in England and sell people frames photographs of their houses from the air. Today people spend hours looking at the aerial photography layer on Google Maps wondering why so many people […]

We Know Where Your Browser Lives

Maybe I’m a little late in finding this, but if you have FireFox 3.5 or higher try clicking this link (you will have to agree to let your browser divulge your location to open the link). The JavaScript code run when clicking the link is as follows, and can also be pasted directly into your […]

Masquerades, Geocaching, and Easter Eggs

Thirty years ago Kitt Williams wrote, or rather painted, the children’s book  Masquerade. Each page had a picture that contained hidden clues pointing to the location of an 18-carat gold, jewel-encrusted hare buried somewhere in Britain. It sparked a National treasure hunt and sold 2 million copies. I remember being fascinated with the pictures and […]